Mathematical Concepts | MCQs

Explanation

Integers (like -2, 0, 3) can be written as a ratio (e.g., -2 = -2/1), so they are part of rational numbers.

Rational numbers include all numbers that can be expressed as p/q, where q ≠ 0.

Explanation

In mathematics, the natural numbers are those numbers used for counting and ordering.

Numbers used for counting are called cardinal numbers, and numbers used for ordering are called ordinal numbers.

Explanation

The number 1 is called the multiplicative identity because multiplying any real number a by 1 leaves it unchanged: a × 1 = 1 × a = a.

This property holds for all real numbers (∀ a ∈ R).

Explanation

900 As it is the only even number among the other options .

Explanation

A rectangular array of real numbers, or any numbers, enclosed in square brackets is called a matrix.

Matrices are widely used in mathematics, especially in linear algebra, for various operations such as addition, multiplication, and finding determinants.

Explanation

Explanation

( ) is commonly referred to as Parenthesis.

But it is also known as Circled bracket or Curved brackets.

Explanation

The x-coordinate is negative and the y-coordinate is positive → (-1, √2).

This combination (−, +) always lies in Quadrant II.

Explanation

Universal set (U) = {1, 2, 3, 4, 5, 6}

Set A = {2, 3}

Complement of A means all elements in U that are not in A → {1, 4, 5, 6}

Explanation

P(A) is the power set of A = {1, 2}, which includes all subsets: ∅, {1}, {2}, {1, 2}.

So, {2} is one of the subsets, hence it is an element of P(A).